/** @file
*
*  Copyright (c) 2023, Mario Bălănică <mariobalanica02@gmail.com>
*
*  SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/

#ifndef __RK860X_REGULATOR_DXE_H__
#define __RK860X_REGULATOR_DXE_H__

#include <Uefi.h>

#define RK860X_REGULATOR_SIGNATURE          SIGNATURE_32 ('R', 'K', '8', '6')

#define I2C_GUID \
  { \
  0xadc1901b, 0xb83c, 0x4831, { 0x8f, 0x59, 0x70, 0x89, 0x8f, 0x26, 0x57, 0x1e } \
  }

typedef struct {
	UINT8 VolReg;
	UINT8 SleepReg;
	UINT8 EnReg;
	UINT8 SleepEnReg;
	UINT8 VolMask;
	UINT16 NumVoltages;
	UINT32 VselMin;
	UINT32 VselStep;
} RK860X_REGULATOR_CONFIG;

typedef struct {
  UINT32                      Signature;
  EFI_HANDLE                  ControllerHandle;
  EFI_I2C_IO_PROTOCOL         *I2cIo;
  RK860X_REGULATOR_PROTOCOL   Rk860xRegulatorProtocol;
  RK860X_REGULATOR_CONFIG     Config;
} RK860X_REGULATOR_CONTEXT;

#define RK860X_REGULATOR_SC_FROM_IO(a) CR (a, RK860X_REGULATOR_CONTEXT, I2cIo, RK860X_REGULATOR_SIGNATURE)
#define RK860X_REGULATOR_SC_FROM_PROTOCOL(a) CR (a, RK860X_REGULATOR_CONTEXT, Rk860xRegulatorProtocol, RK860X_REGULATOR_SIGNATURE)

/* Registers & fields */
#define RK860X_VSEL0_A              0x00
#define RK860X_VSEL1_A              0x01
#define RK860X_VSEL0_B              0x06
#define RK860X_VSEL1_B              0x07

#define  RK860X_VSEL_BUCK_EN        BIT7
#define  RK860X_VSEL_A_NSEL_MASK    0x3F
#define  RK860X_VSEL_B_NSEL_MASK    0xff

#define RK860X_ID1                  0x03
#define  RK860X_DIE_ID_MASK         0x0F
#define  RK860X_CHIP_ID_00_01       8
#define  RK860X_CHIP_ID_02_03       10

#define RK860X_NVOLTAGES_64         64
#define RK860X_NVOLTAGES_160        160

#define RK860X_MAX_VOLTAGE          1500000

EFI_STATUS
EFIAPI
Rk860xRegulatorSupported (
  IN EFI_DRIVER_BINDING_PROTOCOL *This,
  IN EFI_HANDLE ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
  );

EFI_STATUS
EFIAPI
Rk860xRegulatorStart (
  IN EFI_DRIVER_BINDING_PROTOCOL *This,
  IN EFI_HANDLE ControllerHandle,
  IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
  );

EFI_STATUS
EFIAPI
Rk860xRegulatorStop (
  IN EFI_DRIVER_BINDING_PROTOCOL *This,
  IN  EFI_HANDLE ControllerHandle,
  IN  UINTN NumberOfChildren,
  IN  EFI_HANDLE *ChildHandleBuffer OPTIONAL
  );

EFI_STATUS
EFIAPI
Rk860xRegulatorGetVoltage (
  IN CONST RK860X_REGULATOR_PROTOCOL *This,
  OUT UINT32 *Voltage,
  IN BOOLEAN Suspend
  );

EFI_STATUS
EFIAPI
Rk860xRegulatorSetVoltage (
  IN CONST RK860X_REGULATOR_PROTOCOL *This,
  IN UINT32 Voltage,
  IN BOOLEAN Suspend
  );

EFI_STATUS
EFIAPI
Rk860xRegulatorGetEnable (
  IN CONST RK860X_REGULATOR_PROTOCOL *This,
  OUT BOOLEAN *Enable,
  IN BOOLEAN Suspend
  );

EFI_STATUS
EFIAPI
Rk860xRegulatorSetEnable (
  IN CONST RK860X_REGULATOR_PROTOCOL *This,
  IN BOOLEAN Enable,
  IN BOOLEAN Suspend
  );

#endif // __RK860X_REGULATOR_DXE_H__
